Preventing User To Ctrl+Copy and Paste Using javascript

          Preventing User To Ctrl+Copy and Paste Using javascript
-For This We need To Write this Function and  Write On Textbox
like this

<asp:TextBox ID="txtfname" runat="server" onKeyDown="return DisableControlKey(event)" onMouseDown="return DisableControlKey(event)"> </asp:TextBox>




function DisableControlKey(e)

{

// Message to display

var message = "Cntrl key/ Right Click Option disabled";

// Condition to check mouse right click / Ctrl key press

if (e.which == 17 || e.button == 2) {

alert(message);

return false;

}

}